Radiologic Technologist Practice Exam

Which part of the thoracic vertebrae articulate with the heads of the ribs?

1. Bodies

2. Laminae

3. Pedicles

4. Transverse processes

The correct answer is: Bodies

The bodies of the thoracic vertebrae are the correct answer because they feature articulating surfaces known as costal facets, which are specifically designed to connect with the heads of the ribs. This articulation is crucial for the stability of the rib cage, allowing for the expansion and contraction of the thoracic cavity during breathing. Each thoracic vertebra typically has two costal facets on each side of its body, where the heads of the corresponding ribs attach. The laminae, located between the spinous processes and the transverse processes, play a role in protecting the spinal cord but do not have articulating surfaces for rib connections. Similarly, the pedicles serve as a bridge between the vertebral body and the vertebral arch but do not articulate with ribs. Finally, the transverse processes do connect with the ribs as well, but only at the costal tubercle of the rib, and they are not directly involved with the heads of the ribs, which is why they're not the correct answer to this question.